From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Results of tests at Brooklands on under bonnet temperatures.
| Identifier | ExFiles\Box 155\1\ scan0304 | |
| Date | 26th June 1937 guessed | |
| (SHEET 5) RESULTS OF TESTS AT BROOKLANDS ON UNDER BONNET TEMPERATURES ETC. CONDITIONS OF TEST | CAR SPEED & LOAD | AIR TEMP. DURING TESTS °C. | TEMP. OF AIR PASSING FAN °C | TEMP OF AIR AT PETROL PUMPS °C. | TEMP. OF PETROL ENTERING PUMP °C STD. MATRIX. BONNET SHUTTERS CLOSED | IDLING STATIONARY | 19.0 | 85 | 65 | 39 STD. FAN. | 40 M.P.H. FULL THROTTLE | — | — | — | — RADIATOR SHUTTERS FULL OPEN | MAX. SPEED FULL THROTTLE | 18.0 | 51 | 51 | 46 STD. MATRIX. BONNET SHUTTERS OPEN | IDLING STATIONARY | 18.0 | 80 | 57 | 26 STD. FAN. | 40 M.P.H. FULL THROTTLE | 16.5 | 54 | 54 | 41 RADIATOR SHUTTERS FULL OPEN | MAX. SPEED FULL THROTTLE | 18.0 | 48 | 48 | 42 STD. MATRIX. 5 BLADE FAN | IDLING STATIONARY | 22.0 | 73 | 60 | 39 1.1/1 RATIO. BONNET SHUTTERS OPEN | 40 M.P.H. FULL THROTTLE | 24.0 | 59 | 58 | 49 RADIATOR SHUTTERS OPEN | MAX. SPEED FULL THROTTLE | — | — | — | — STD. MATRIX. LOUVERED BONNET | IDLING STATIONARY | 22.0 | 70 | 55 | 36 5 BLADE FAN | 40 M.P.H. FULL THROTTLE | — | — | — | — 1.1/1 RATIO. RADIATOR SHUTTERS OPEN | MAX. SPEED FULL THROTTLE | 22.0 | 50 | 47 | 36 STD. MATRIX. BONNET SHUTTERS OPEN | IDLING STATIONARY | 24.0 | 75 | 61 | 41 5 BLADE FAN | 40 M.P.H. FULL THROTTLE | 24.0 | 58 | 56 | 48 1/1 RATIO. RADIATOR SHUTTERS OPEN | MAX. SPEED FULL THROTTLE | 21.5 | 51 | 49 | 38 MATRIX WITH AIR SLOTS | IDLING STATIONARY | 24.0 | 71 | 58 | 45 5 BLADE FAN | 40 M.P.H. FULL THROTTLE | 22.0 | 56 | 54 | 46 1/1 RATIO. BONNET SHUTTERS OPEN | MAX. SPEED FULL THROTTLE | 21.0 | 53 | 47 | 37 RADIATOR SHUTTERS OPEN STD MATRIX. 5 BLADE FAN | 55 M.P.H. TOURING | 24.0 | 62 | 56 | 46 1/1 RATIO. RAD. SHUTTERS COUPLED TO CALORSTAT | MAX. SPEED FULL THROTTLE | 25.0 | 58 | 56 | 51 BONNET SHUTTERS OPEN MATRIX WITH AIR SLOTS | 55 M.P.H. TOURING | 22.0 | 54 | 48 | 44 5 BLADE FAN | MAX. SPEED FULL THROTTLE | 21.0 | 53 | 47 | 37 1/1 RATIO. RAD. SHUTTERS COUPLED TO CALORSTAT NOTE:- THE PETROL FEED TEMPERATURES DO NOT CONVEY MUCH OWING TO VARIATIONS DUE TO QUANTITY OF PETROL IN TANK, WIND, ETC. | ||